Patents by Inventor Frederick M. J. Wootton

Frederick M. J. Wootton has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Vehicle wheel sensors, and method of converting a sine wave signal in a counting or measuring device
    Patent number: 5471361
    Abstract: A vehicle wheel speed sensor has a rotor 11 provided with a series of circumferentially spaced rotor elements 12 mounted on a wheel axle 10. A sensor 13 mounted on a relatively non-rotatable support is influenced by passage of the rotor elements to output a sine wave signal. The sine wave signal is fed for processing to an interface unit 15 on the vehicle and pulses are generated at at least two predetermined phases of each cycle of the sine wave. A method of producing marker pulses by detecting the zero cross-over points and the peaks and troughs of a sine wave signal, and generating a marker pulse at each zero cross-over point and at each peak and trough of the sine wave signal is also described.
    Type: Grant
    Filed: July 20, 1992
    Date of Patent: November 28, 1995
    Assignee: Westland Aerospace Limited
    Inventor: Frederick M. J. Wootton